Several things to try.
1. Did you uninstall the old driver first? this is a good way to install a newer driver on re-boot. Just make sure that the un-archived files are on the hard drive or CD.
2. I seem to recall the las time I updated, there were additional drivers and programs, such as Network Capture. If you update one driver, you need the updated associated files as well.
3. Don’t for get the ‘If all fails, save your data and do a clean install.
The camera on a couple of Sony’s are touchy to get set up, once you alter the original files.
Rik